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    This was a bug at HBase 1.0.1, it has been patched, so an update to 1.0.2 or further should solve the problem. URL for the Jira thread: https://goo.gl/c5oa6f

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java.net.ConnectException: Connection refused	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)	at org.apache.kafka.common.network.PlaintextTransportLayer.finishConnect(PlaintextTransportLayer.java:51)	at org.apache.kafka.common.network.KafkaChannel.finishConnect(KafkaChannel.java:73)	at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:309)	at org.apache.kafka.common.network.Selector.poll(Selector.java:283)	at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:260)	at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:229)	at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:134)	at java.lang.Thread.run(Thread.java:745)